Flash 8 audio streaming

New commer to flash (Gosh, that’s a hard way of programming, and the tutorials are really useless: they don’t explain the WHYs!).
I have designed a small media player to play an audio/video stream from http://212.72.165.26:9386. (Tinman Net)
Using “control”, “test movie”, the player plays well.
Using “Publish preview”, the player does NOT play (although buttons and other things work).
Publishing, adding the embedded code in the page, uploading the swf file. The player is there, the buttons work, but the music does not play.
What could I have omitted?
The website: www.tinmandownloads.com
Button “T” (top right) plays a fixed song from another website, treated as a stream, correctly tagged. Works all cases.
Button “N” plays the stream. Silence.
Screen left (not developed: reserved to put an advert or video)
Screen right: shows artist, title etc…
Bottom right band: place for info, duration etc…
Urgent help required!
Additions:
Publish preview as flash works. Publish preview as HTML does not play stream sound.
It is not the stream address: I have checked with severals, same results.
It is not “cross-domain” problem: I have put a stream on another website and read it from another.